Protect important documents long-term in these acid free, archival quality envelopes. Or use these translucent, super durable polypropylene carriers to organize everyday papers. Both the side- and top-loading envelopes expand to 1-1/4" to hold over 200 sheets of paper. Heavy-duty polypropylene envelopes resist tears and repel moisture. These acid free, archival quality envelopes are perfect for long-term storage of important documents.